Machine for setting off impressions on glass or other brittle substances.



' Witnesses No. 665,l80. Patented Ian; I.. 19m.

0. means".- MACHINE FDR SETTING OFF IMPRESSIONS 0N GLASS OR OTHERBBITTLE SUBSTANCES.

' Application filed July 9, 1900.) (No Mndel.) I I 2 Sheets-Sheet I.

I lmzerzzof Max CAM I v No. 665,|80. Patented Jan. I, mm.

C. N COHEN. MACHINE FOR SETTING OFF IMPRESSIONS 0N GLASS OR OTHERBRITTLE SUBSTANCES.

Application filed July 9, 1900-) (No Modem 2 Sheets-Sheet 2.

THE norms PETERS co. PNOTO-LIYHO.. WASHINGTON u. c.

UNITED STATES PATENT OFFIcE.

OOSMAN HENRY COHEN, OF LONDON, ENGLAND.

MACHINE FOR SETTING OFF IMPRESSIONS ON GLASS OR OTHER BRITTLESUBSTANCES.

SPECIFICATION forming part of Letters Patent No. 665,180, dated January1, 1901.

Application filed July 9,1900. Serial No. 23,037. '(No model.)

To aZZ whom it may concern.-

Be it known that I, COSMAN HENRY COHEN, a subject of the Queen of GreatBritain, residingatLondon, England,haveinvented new and usefulImprovements in Machines for Setting Off Impressions on Glass or otherBrittle Substances, of which the following is a specification.

My invention relates to certain machines for setting off on sheets orslabs of glass and other brittle substances impressions taken fromlithographic stones, engraved blocks,

consists of a rotatory cylinder mounted in a traveling carriage which isarranged to pass over both or all of the said articles. In working withmachines embodying the said featu res of construction I have found thatwhere sheets or slabs of glass or other brittle material which are notof uniform thickness at all parts have to be dealt with the inequalitiesof thickness cause imperfection of the setting off in consequence of thepressure of the surface of the cylinder being less on some parts of thesurfaces on which the set off is received than on others. I have alsofound that where a pad of elastic or yielding material is placed betweensuch sheets or slabs and the supporting-table of the machine for thepurpose of correcting the said imperfection the said sheets or slabsoccasionally break under the pressure of the cylinder, owing to the saidpad yielding only at and near the part beneath that portion of the sheetor slab which for the time being is in contact with the setting-offsurface of the cylinder.

Now the object of my said invention is to admit of use of the aforesaidmachines for the purpose of setting off on sheets or slabs of glass orother brittle material of unequal the aforesaid specification.

According to my said invention I provide for support of the work in themachine in such a manner that while the setting-off cylinder is actingon the front or surface of the work which is required to receive theset-off resistance to the pressure of the cylinder is produced on theback or reverse surface of the work only at the part immediately beneaththat which for the time being is in contact with the said cylinder, andto insure equality of the pressure of the cylinder at all points of ihepart of the work in contact therewith, notwithstanding inequality inthickness of the said part, I combine an elastic or yielding elementwith the means by which the said pressure is resisted.

A convenient arrangement of parts whereby my said invention may becarriedinto effect is illustrated in the accompanying drawings.

Figure 1 of the said drawings is a plan view of certain portions of theaforesaid patented machine, the said portions being principally thefeed-table and the setting-off cylinder, which latter is shown at thepart of the machine where the damping-table (not illustrated) issituated. The said figure also illustrates the provision for the supportof the work according to my present invention, the same being shown inconnection with the feedtable. Fig. 2 is a section taken on the lineA'A, Fig. 1, showing the setting-off cylinder in the same positionrelatively to the feedtable as in Fig. 1. Fig. 3 is a section taken onthe line B B, Fig. 1, but showing the setting-off cylinder in itsadvance traverse over the feed-table. Fig. 4 is a detail view showing insection, taken on the line C (3, Fig. 1, a portion of the mechanismwhereby resistance to the pressure of the setting-off cylinder isproduced, as hereinbefore stated, on the back or reverse surface of thework.

In the following description the several parts of the accompanyingdrawings are referred to by the letters marked thereon.

In all the figures of the accompanying drawings the same letters ofreference indicate the same parts, and such of the parts as are the sameas those of the machine illustrated in the drawings of the aforesaidUnited States specification and are hereinafter referred to are markedwith letters of reference the same as those on corresponding parts ofthe drawings of the said United States specification, the said partsbeing the following: The feedtable 2, the setting-off cylinder i and itsshaft t" and toothed wheels 13 q, the frames #71 constituting thecarriage supporting the said cylinder, portions of the side frames ofthe machine constituting the slides a ct on which the cylinder-carriagetravels, and the racks 'r r with which the toothed wheels 19 q gear.

The aforesaid arrangement constituting the present invent-ion consistsmainly of the following parts: An apron or sheet I), of the materialknown as rubber printing-blanket or other suitable flexible material,extended above the feed-table, a roller 0, covered or coated withelastic or yielding material 0 mounted beneath the said apron inbearings 0 0 carried by sliding supports 0 c, and means for causing thesaid roller to travel beneath the apron while the setting-off cylinderis traveling above it during working of the machine.

The apron b passes over bars 79 6 supported by brackets cl (1 (Z (Z d (iaffixed to the said table by screws, and is secured at one edge to thebar b by a clamping-bar b and at the opposite edge to a roller f,working in bearings formed on the brackets d (l,and is kept in tension,as required, by engagement of a pawl f with a ratchet-Wheelf on the saidrollerf. The sliding supports 0 c of the hearings of the roller 0 workbetween guides g g, secured to the feed-table c, and are connectedtogether by rods h 71, and nuts 7L3 7?, and the said bearings rest onsprings as shown in Fig. 4, which springs permitthe roller 0 to yield topressure from above.

The traveling of the roller 0 beneath the apron I) while the cylinder istraveling above it is provided for as follows: Below and at or near eachend of the cylinder '5 is a pawl 75, which is normally held by a springagainst a stop k and has a projecting lug 7;, which pawls 7t 7t" arejointed to bars Z 1, carried by rods m m, secured at their ends to thesupports of the setting-01f cylinder 2', and on the sides of the slidingsupports 0 c of the bearings of the roller 0 are secured plates bearinglugs 'n' a a n standing in the paths of motion of the lugs k on thepawls 7a 7a, and secured to the guides g g on the table 6 in the pathsof motion of the rounded noses of the said pawls are inclines o o o 0the effect of which inclines is to cause the lugs k 70 on the pawls ItIt to engage with and to be disengaged from the lugs on the slidingsupports 0" c of the pressure resisting roller 0, as required, the axesof the setting-off cylinder 2' and of the said roller 0 being in thesame vertical plane, or approximately so, when the pawls 7; k areengaged with the lugs n n and the cylinder 2' is advancing over the workto produce the set-0ft. For the purpose of checking free motion of thesliding supports c a when released from engagement with the pawls 7c issprings s s s s are secured in the path of motion of the rods h 7L2,connecting the said sliding supports.

The provision for insuring accurate lay of the work with the arrangementhereinbefore described consists of a bar 6, having a projection 19,forming a right angle with one of its edges and having slots in its endparts, in which slots are engaged clamping-screws 1 15 which are alsoengaged with slots in bars 6 t, secured to the brackets d d (1 d Thesaid slots and screws admit of adjustment of the said bar 25 forvariation of the lay when requisite.

it represents a tile placed on the feed-apron b in position to receive aset-off from the cylinder t'.

The action of the arrangement hereinbe' fore described is as follows:When during working of the machine the settiug-offcylinder 2 hasadvanced to the feed-apron b, the pawls 7t 7c are raised by the inclines0'0, and on the said pawls descending after passing the said inclinesthe lugs 70 70 pass between the lugs n n n n on the sliding sup ports 0c of the roller 0, which during the further advance of thecylirider-carriage t i are caused to move forward with it by the bearingof the lugs 75 is against the lugs 71 11 the axes of the roller 0 and ofthe cylinder 11 while the sliding supports 0 0 are thus moved forwardbeing in the same vertical plane as is shown in Fig. 3. Thus while thesettingoff cylinder t' is passing over the work to produce the set-offcontact between the settingoff surface of the said cylinder and the workis maintained by the pressure-resisting roller 0 under the feed-apron b,which roller supports the work only at the part which is actually incontact with the setting-off cylinder, the other parts being supportedonly by the said feed-apron b. The work, therefore, is not subjectedduring the setting off to any strain liable to produce fracture. Thesprings jj beneath the bearings of the pressure-resisting roller 0permit it to approach and r cede from the setting-off cylinder e' and totake an angular position relatively thereto in a vertical plane, andthus insure equality of pressure of the acting part of the said cylinderat all points notwithstanding irregularities of thickness at differentparts of the work. After the set-off has been produced the slidingsupports 0 c of the roller 0 are freed from the cylinder-carriage & i byrise of the pawls 1c 7r, over the inclines 0 0 and the said supports androller come to rest without shock, their momentum being absorbed bycompression of the springs s s by the rod h On the reverse motion of thecylinder-carriage 2' i after it has reached the end of its forwardstroke, the lugs 10 k on the pawls k it again enter between the lugs n nn n on the sliding supports 0 c of the roller 0' and by bearing againstthe lugs 71 n draw the said roller backward until disengagement of thesaid lugs 10 k is produced by the inclines o 0, when continued backwardmotion of the said roller and its supports is arrested by the springs ss, which act as described with reference to the springs s 8 the positionof the said roller and its supports when so arrested being as shown inFig. 2.

I claim as my said invention the following:

1; In a machine of the chararcter described, a flexible support for thework, a setting-off cylinder operating over said support, a yieldingroller operating beneath said support, and means carried by saidcylinder for operatin g said roller simultaneously therewith.

2. In a machine of the character described, a flexible support for thework, a setting-off cylinder operating over said support, a pair ofyielding slidable bearings, a roller journaled therein and operatingbeneath said support, and means carried by said cylinder and adapted toengage said bearings for operatin g said roller simultaneously with theoperation of the cylinder.

3. In a machine of the character described, a flexible support for thework, a setting-off cylinder, operating means therefor, a pair ofspring-pressed sliding bearings, lugs carried thereby, a rollerjournaled in said bearings, and means carried by said cylinder andadapted to engage said lugs for operating said roller simultaneouslytherewith in parallel relation.

4. In a machine of the character described, the combination with asetting-off cylinder operating upon the work, of a spring-pressedyielding roller operating beneath the work and in parallel relation withsaid setting-0E cylinder, and means connected to said roller andoperated by said cylinder for simultaneously operating said rollertherewith.

5. In a machine of the character described, a flexible support for thework, a settingoff cylinder, a pair of guides arranged at each side ofsaid support, spring-pressed sliding bearings operating in said guides,a roller journaled in said bearings, and means connected to saidcylinder and engaging said bearings for operating the same, impartingthereby a rotary movement to said roller simultaneously with theoperation of said cylinder.

6. In a machine of the character described, a flexible support for thework, a setting-off cylinder, a spring-pressed roller, means connectedthereto for operating the same, lugs carried by said means, pawlscarried by said cylinder and adapted to engage said lugs for operatingsaid means, means for bringing said pawls into operative engagement withsaid lugs, and means for releasing said pawls from I horizontal movementof said cylinder and roller.

9. In a machine of the character described, a setting-off cylinder, apair of spring-pressed sliding bearings operated thereby, apair of rodsfor connecting said bearings together, a spring-pressedpressure-resisting roller journaled in said bearings, a flexible supportfor the work interposed between said roller and cylinder during saidoperation, and a position-bar for the work.

OOSMAN HENRY COHEN. [L. s]

' Witnesses:

WILLIAM HoLMEs, HERBERT J EssE COLEMAN.

